桃育种中的抗病虫供体山桃果实品质低的生化基础

桃新品种的数量超过所有温带水果，但是，由于生产上使用的品种的种质来源狭窄，因此，必须从未驯化栽培的近缘野生种中寻找抗病虫的遗传资源。山桃(Prunus davidiana)起源于中国西北地区，已鉴定它是桃绿蚜的抗源，同时还抗李树痘病毒、白粉病、桃卷叶病。

The State Prize for 1991 Science and Technology Advance

According to the report in Science and Technology Daily on 10 July 1991, prize winners for the State Prize for 1991 Science and Technology Advance in China have been selected by the Evaluation Committee of the State Prize for 1991 Science and Technology Advance. Among the prizes, eight programs were concerned with rice research: Pathogenetic Types of Rice Bacterial Leaf Blight in China and the Application in Disease-resistant Breeding, by FANG Zhongda,